This is the first part of a series of posts that show an analysis of practical circuits that use an operational amplifier (op-amp).
Category: Analog electronics
Operational amplifier: how does it work?
The operational amplifier, or op-amp, has great utility on electronics. In this post, it’s shown the operation of this integrated circuit (IC).
2 projects with LED effect
The two shown projects to make LED effect using the Johnson counter 4017.
Electrolytic capacitor: how it works?
Why does the electrolytic capacitor has polarity? Why there is a voltage limit? These and other questions are answered in this post.
MOSFET: how does it work?
The MOSFET is another type of field effect transistor. Much more used than JFET and it’s the most important component for digital computers.
Junction field effect transistor
The junction field effect transistor (FET) is a component with many applications. In this post, are shown the structure and the operation.
2 common base BJT amplifier projects
The common base is little known configuration for amplifiers using BJT. This type is used in high frequencies.
2 common collector BJT amplifier projects
In this post, it is shown another type of amplifier configuration using BJT. This time, it is the common collector or emitter follower.
2 projects of BJT common emitter amplifiers
In this post, it is shown how to design a BJT amplifier with voltage divider on common emitter mode. Two examples of projects are presented.
AC detector and cooler with LED effect
In this post, are shown 2 circuit projects: an AC voltage detector and a cooler with LED effect.